本文選題：輸電線路 + 分裂導(dǎo)線��； 參考：《高電壓技術(shù)》2014年02期

【摘要】：雨凇覆冰后的輸電線路導(dǎo)線表面電場會(huì)發(fā)生畸變從而降低起暈電壓值,但目前國內(nèi)外尚未深入分析雨凇覆冰對導(dǎo)線電暈特性的影響規(guī)律,且縮比導(dǎo)線模型所得結(jié)論與工程實(shí)際存在較大差異。為探求雨凇覆冰導(dǎo)線的電暈特性,在人工氣候?qū)嶒?yàn)室內(nèi)完成了3種分裂導(dǎo)線雨凇覆冰后的交流電暈試驗(yàn),結(jié)合紫外成像與擬合法對導(dǎo)線雨凇覆冰后的電暈特性進(jìn)行了測量,建立了有限元模型并分析了導(dǎo)線表面電場強(qiáng)度以彌補(bǔ)雨凇電暈研究的空缺。結(jié)果表明:雨凇覆冰會(huì)降低裸導(dǎo)線起暈電壓值約50%;導(dǎo)線表面的起暈電壓會(huì)在最初的15 min內(nèi)下降較快,之后會(huì)隨著雨凇覆冰程度的增加而繼續(xù)下降,但其速度逐漸飽和;相同雨凇覆冰時(shí)間內(nèi)分裂子導(dǎo)線越多則起暈電壓值越高;覆冰水電導(dǎo)率的大小并不會(huì)直接改變或影響雨凇覆冰表面形態(tài),但起暈電壓值卻會(huì)隨著覆冰水電導(dǎo)率的增加而持續(xù)降低。所得結(jié)論可供雨凇覆冰地區(qū)架空輸電線路的設(shè)計(jì)和選型參考。
[Abstract]:The electric field on the surface of transmission lines after rime is covered with ice will be distorted so as to reduce the corona voltage. However, at present, the influence of rime on the corona characteristics of transmission lines has not been thoroughly analyzed at home and abroad. The conclusion of the model is quite different from that of engineering practice. In order to find out the corona characteristics of rime coated conductors, the AC corona test after rime icing of three kinds of split conductors was completed in the artificial climate laboratory. The corona characteristics of rime after rime were measured by combining ultraviolet imaging and fitting method. The finite element model is established and the electric field intensity on the conductor surface is analyzed to make up for the lack of the research on rime corona. The results show that the corona voltage of the bare conductor will be reduced by about 50, the corona voltage on the surface of the conductor will decrease rapidly within the first 15 min, and then will continue to decrease with the increase of the degree of rime icing, but the speed will gradually saturate. The more splitters in the same time of rime icing, the higher the corona voltage, and the more conductivity of icing water does not directly change or affect the surface morphology of rime. However, the corona voltage will continue to decrease with the increase of water conductivity. The conclusions can be used as reference for the design and selection of overhead transmission lines in rime-covered area.
【作者單位】： 重慶大學(xué)輸配電裝備及系統(tǒng)安全與新技術(shù)國家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(973計(jì)劃)(2009CB724502;2009CB724501)~~
【分類號】：TM752.5

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